Long-term HVAC reliability for commuter trains | Lumikko Service × Pääkaupunkiseudun Junakalusto Oy
In 2025, Lumikko Service initiated a comprehensive HVAC overhaul program for commuter train rolling stock.
The objective was clear: to ensure predictable performance, controlled lifecycle costs, and long-term reliability for the next 15 years.
Watch video of the project
Customer objective: predictable lifecycle and operational reliability
For the customer, Pääkaupunkiseudun Junakalusto Oy, HVAC refurbishment is a preventive lifecycle decision.
Regularly scheduled overhauls reduce operational risks, eliminate unexpected failures, and support uninterrupted service.
“We can recommend Lumikko as a reliable maintenance partner.”, describes Ossi Piiroinen, Fleet Engineer at Pääkaupunkiseudun Junakalusto Oy.
A service model built around responsibility
Lumikko’s service model is based on full responsibility throughout the refurbishment process.
HVAC units are collected directly from the depot, refurbished at Lumikko’s facilities, fully tested, and returned ready for operation.
This approach simplifies logistics, shortens lead times, and clearly defines responsibility.
Local presence and accountability are an important part of the service
One of the most concrete benefits of the project for the customer has been local presence and a clear division of responsibilities. Lumikko collects the air conditioning units from the depot itself and is responsible for them throughout the entire refurbishment process.
“It has been easy to coordinate schedules. Lumikko collects the HVAC units directly from us, which is something no one else has offered. From the moment a unit leaves our premises, the responsibility is fully with Lumikko.”
This operating model reduces the customer’s workload and makes project management clearer.
Comprehensive HVAC refurbishment
The refurbishment process includes:
- unit collection and logistics
- cleaning, testing, and refrigerant handling
- component replacements and refrigeration circuit work
- surface repairs and corrosion protection
- final testing and delivery
The goal is not temporary repair, but restored, predictable operation.
Quality measured by what doesn’t happen
The project has also exceeded the customer’s expectations.
“The units have performed as expected. No warranty issues, and the overall quality has been high.” Ossi tarkentaa.
For Lumikko, success means no need to revisit the work.
Designed for long-term partnerships
Lumikko continuously develops its processes and facilities to support repeatable, production-level refurbishment — ensuring consistent quality for long-term fleet maintenance programs.
More on the topic:
- Lumikko Huoltopalvelut partnered with Junakalusto
- Lumikko Huoltopalvelut at a new address starting June 1, 2025: Sinikellonkuja 5
- SJ Bistro Car Modernization | Lumikko’s Refrigeration Units and Maintenance Services
Looking for a reliable HVAC refurbishment partner?
Contact us
Antti Myllynen
Sales Manager, Aftersales
+358407594864
spareparts@lumikko.fi